Merge topic 'tidy-sha1-comment'
08353542 clang-tidy: Clarify comment explaining purpose of CLANG_TIDY_SHA1
Acked-by: Kitware Robot <kwrobot@kitware.com>
Merge-request: !1497
diff --git a/CMakeLists.txt b/CMakeLists.txt
index bf0c4d1..fafe536 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -251,7 +251,12 @@
endif()
set(CMAKE_CXX_CLANG_TIDY "${CLANG_TIDY_COMMAND}")
- # provide definitions for targets that require a rebuild once .clang-tidy changes
+ # Create a preprocessor definition that depends on .clang-tidy content so
+ # the compile command will change when .clang-tidy changes. This ensures
+ # that a subsequent build re-runs clang-tidy on all sources even if they
+ # do not otherwise need to be recompiled. Nothing actually uses this
+ # definition. We add it to targets on which we run clang-tidy just to
+ # get the build dependency on the .clang-tidy file.
file(SHA1 ${CMAKE_CURRENT_SOURCE_DIR}/.clang-tidy clang_tidy_sha1)
set(CLANG_TIDY_DEFINITIONS "CLANG_TIDY_SHA1=${clang_tidy_sha1}")
unset(clang_tidy_sha1)
